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| author | Sagi Grimberg <sagi@grimberg.me> | 2021-06-16 14:19:33 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-16 13:23:35 +0200 |
| commit | 459de98d7a6b3d504b5e8664f32f59a306dd425c (patch) | |
| tree | 0cf2c68e243d1c80bb82569e965adfb612c1b353 /kernel/params.c | |
| parent | afd5730969aec960a2fee4e5ee839a6014643976 (diff) | |
params: lift param_set_uint_minmax to common code
[ Upstream commit 2a14c9ae15a38148484a128b84bff7e9ffd90d68 ]
It is a useful helper hence move it to common code so others can enjoy
it.
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Stable-dep-of: 3ebc46ca8675 ("tcp: Fix shift-out-of-bounds in dctcp_update_alpha().")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/params.c')
| -rw-r--r-- | kernel/params.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/params.c b/kernel/params.c index ce89f757e6da..8339cf40cdc7 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -245,6 +245,24 @@ STANDARD_PARAM_DEF(long, long, "%li", kstrtol); STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", kstrtoul); STANDARD_PARAM_DEF(ullong, unsigned long long, "%llu", kstrtoull); +int param_set_uint_minmax(const char *val, const struct kernel_param *kp, + unsigned int min, unsigned int max) +{ + unsigned int num; + int ret; + + if (!val) + return -EINVAL; + ret = kstrtouint(val, 0, &num); + if (ret) + return ret; + if (num < min || num > max) + return -EINVAL; + *((unsigned int *)kp->arg) = num; + return 0; +} +EXPORT_SYMBOL_GPL(param_set_uint_minmax); + int param_set_charp(const char *val, const struct kernel_param *kp) { if (strlen(val) > 1024) { |